I present to you:
The Spell-Storing Smackdown OR
"Thanks for the hit points."
Max out a wizard for dagger throwing, and then utilize spell-storing daggers with metamagicked Vampiric Touches.
Halfling Wiz 16
Str 8+3d4(TT) = ~15
Dex 20+4(levels)+3d4(TT) = ~31
Con 10
Int 13+6 = 19
Wis 8
Cha 8
HP ~40
BAB: +8/+3
Feats:
Scribe Scroll
Maximize Spell
Craft Magic Arms and Armor
Weapon Focus: Dagger
Rapid Shot
Improved Rapid Shot [Non-Core, Optional](Dragon 275, no penalties for rapid shot)
Empower Spell
Far Shot
Point Blank Shot
Equipment:
6x Dagger +1, Spell Storing, Returning
Headband of Intellect +6
Spells:
Maximized Empowered Vampiric Touch, Stored in each dagger
Haste, Running
Empowered Tenser's Transformation, Running
Hp: ~40+(1.5*16d6)= ~124
BAB: +16/+11/+6/+1
Now for the Attack Sequence:
At range of <20 ft:
Dagger +1 Spell Storing, Returning +30/+30(Rapid Shot)/+30(Haste)/+25/+20/+15
W/OUT IRS: +28/+28/+28/+23/+18/+13
Damage per attack: 1d4+4+(60+5d6)
Max Potential Damage: 498 hp
Max Potential Temporary hp gained: 90 hp
Avg. Damage AC 20: 461.3 hp
Avg. Damage AC 25: 419.0 hp
Avg. Damage AC 30: 355.5 hp
EDIT: Missed Halfling Thrown weapon bonus and bonus for size small in attack sequence. Avg. Damage calculations are still slightly inaccurate.
EDIT: Changed range to <20 ft. Temporary hp don't stack: reduced max temporary hp to 90. What's the source for that? Or is it just the "bonuses from the same source don't stack" rule that's in effect?
EDIT: Imp. Rpid Shot is non-core: denoted as optional. Added attack routines w/out IRS.